Anal cancer MRI

Anal cancer Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mohamad Alkateb, MBBCh [2]

Overview

Pelvic MRI may be diagnostic of anal cancer.

MRI Findings in Anal Cancer

MRI is the gold standard for the diagnosis of anal cancer. Common findings include:

• T1: primary and recurrent tumours have low to intermediate signal intensity in comparison to skeletal muscle
• T2: primary and recurrent tumours have high signal intensity in comparison to skeletal muscle
• Nodal metastases have similar signal intensity to the primary tumour